After clicking on Printers on the top panel you should see your newly configured printer:
To print a test page click on Print Test Page! If you did everything correctly and faith is on your side then the printer will spit out a nice CUPS test page.
A good indication that printing the test page worked is when the job is no longer in the job queue. So if you click on Jobs and the test page is still in there after several seconds then your printer will most likely not print.